Refrigerating apparatus



. ay 0-' J. G. KING 1,758,228

REFRIGERATING APPARATUS Filed July 51, 1928 Patented May 13, 1930 UNITED g m-Es; V'PJAJTENT. ops-ice;

zrrssn e. we, or DAYTON, omo, nssr'enoa r raxomamn conrona'rron, or me TON; OEIO, A CORPORATION OF DELAWARE mmomrmo Arrm'ms a u atioameafm1 '31, 1928. Serial ire-man;

The present inventionirelates to refrigerating apparatus and particularly to cooling units ofsuch ap aratus.

One of the 0 yects ofjthe present invention isto provide an improved construction of refrigerat ng element which increasesits ice-freezing eifectiveness.

Another object of the present invention is to provide a simple and econom calar'rangement of refrigerant conduits of refrigerating units which facilitate manufacture. More specifically an tion is to provide an improved arrangement of refrigerant conduits-ofa cooling unitso that each refrigerant conduit will bein in- 7 timate thermal contact withbotha sidewall a In cooling for tors it is desirable to provide supports, sleeves socthat, "when water is and another wall" of a freezing compartment or sleeve of the unit. v t v Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanyingdrawing, wherein a preferred form of the present invention is clearly shown. In the drawings: r g a a Fig. 1 is a front view of a portion ofa refrigerator cabinet with the doors open show 'ing the improved cooling unit.

Fig.2 is a viewon a larger scale than 1 showing the front view of thecoohng unit which is suspended withinthe cooling compartment of the cabinet, the walls of are shown in vertical section; and 1: V Fig 3 is'a side elevation of the'coohngunit drawn to "the same scale as Fig. 2. v household refrigeraor receptacles for receiving ice trays having square outside corners and, divided gr ds frozen therein, all

7 ice cubes produced in the traysiwillbe'sub- This invention is directed .to increasing the amount of surface of the'refrigerant ducts" walls of the ice tray sleeves.

object of the invenwhich is in intimate thermalcont'act with he Referring to the drawings 10 designates a refrigerator cabinet. The cabinet provides an L-shaped food compartment 11 separated from acooling compartment 12 by a horizontal partition'13 and a vertical partition, 14. The partitionll is provided with a' flue 15 admit-tingrelatively warm air from the-food] compartment 11 to the cooling compartment 12-; andthe partition 13 is provided with a flue lfi admitting cooled air from the compartment 12 to the compartment 11. The partition 13 supports a bafile 17 which prevents moisture, dripping from the cooling unit above, from entering the flue 16.. The baflle 1T directs such moisture upon the surface of the, partition 16 and the moistureis conducted away thru a drain pipe 18.

. 'The coolingunitlocated within the compartment 12 includes a boiler or header 20 attached to the top walls of the cabinet 10 by bracket members 21 and 2:2; Condensed refrigerant is conducted to the header 20 from a compressor and condenser (not shown) thru a pipe 23-and a fitting .21; Refrigerant is admitted from the fittingfil as needed; by a tloat controlled valve (not shown) of suitable construction. located in the header 20 and adapted to maintain a predetermined level of liquid refrigerapt within the header. Expanded refrigerant is conducted backto the compressor 26. The refrigerant compressor and condenserfwith which the pipes 23and 26' are connected maybe located outside of the cabinet, if desiredeor may be placed within a machine compartment (not shown) of the cabinet, 'locatedbelow the food compartment 11. a

The cooling unit includes two sets of ret fri rant "ex ansion i e loo 5 30 1d 31 stantially square and uniform. The lcetray p P P p 31 receiving sleeves or receptacles are; usually made to conform closely to the shape-of the extending downwardly from the header 10' in parallel circuit relation to provide an enclosed freezing portion or space. The pipe loops -30 and 31Xare flattened thruout most oftheir length and provided with round ends which connect with the header. One set 30 of the loops are shorter than the other set 31 and divide the central enclosed freezing thru a fitting' 25 and a pipe' tion of the tube on" the other side of the tray receiving sleeves.

transfer is negligible.

portion of the cooling unit into two freezing spaces. Each of the freezing spaces are adapted to contain sup orts, sleeves or ice tray receptacles 33 whini rest upon horizontal leg portions 34 of the pipe loops 30 and 3.1.. The supports or'sleeves 33 are provided with relatively sharp square outside corners 35 to permit the insertion of similar shaped trays 36 for freezing substances placed therein;

In refrigerating elements of the sizes used in ordinary houshold and commercial refrigerating practice the dimensions of the refrigerant conduits and the sleeves or receptacles for the ice trays are such that it is economically impractical to bend a tube so that it can be placed in contact with adjacent sides of a rectangular sleeve. That is, there is a minimum radius on which a tube may be bent safely and economically. 1 This radius is so large that if a portion of the tubeon one side of thebend is placed in contact with one side of the rectangular sleeve, the porof the bend is at a considerable distance fromfthe sleeve, at so great a distance in fact that the heat In order to form a duct which can beplaced in a plane perpendicular to the sides of the sleeve and which will be in intimate contact with both sides adjacent the corner, the duct loops are formed as shown in Fig. 2 with loop portions 37 extending out,- wardly. then inwardly, hereinaftertermed a reverse bent portion. The reversed bent portions 37 are located atthe corners formed by the horizontal leg portions 34 and verti cal leg portions 38 of the refrigerant jloops 30 and 31. This permits the bending ofthe tubes on any desired radius and at the same time permits contacting of the tubewithbo th sides of the sleeve adjacent the .corneiz, Furthermore, to increase the contacting surface 7 between the refrigerant in the ductsandthe sleeves the tubes are flattened. The flattened tubes also have an added advantage in that they can be more readily bent at the corners I lVhile the form of embodiment of the invention as herein disclosed, constitutesa preferred form, it is to beu'nderstood'that other forms might be adopted,.all coming within the scope of the claims which follow.

c What is claimed is as follows. o

1. In a. refrigerating apparatus, a cooling unit including a header, a plurality of supports disposed one above another and adapted to receive ice trays, said supportsfbeing provided with relatively sharp outside corners, and a duct extending between the supports and in intimate thermal contact with the sides forming the corner of the support above the duct. f a

2.,In a refrigerating apparatus, a cooling unit including a support adapted to receive an ice tray,

vloops arran ed in parallel a refrigerant ductincluding vertical and horizontal leg )ortions in intimate thermal contact with suit havin areverse bent portion at t is connectiono said leg portions.

3, In a refrigerating apparatus, a cooling unit" including a'supp'ort' adapted-to receive ice trays, said "support havinga bottom wall andside wall forming a relatively sharp corner and a plurality of refrigerantd'act loops extending along the walls forming said corher and in intimate thermal contact therewith, said duct'loops provided with a reverse bent portion adjacent thecorner.

f 4. In a refrigerating apparatus, unit including a header, a support adapted to receive ice traysasaidsupportliaving a bottom wall and a side wall forming a rela tively sharp corner, and a pluralityiof refrigerant' 'duct loops extending along tihe walls forming said corner and in intimate thermal contact therewith, 'saidfd'uct loops provided witha reverse bent'portion adjacent the corner.v

r 5. In a refrigerating apparatus,acooling unit including a header and. a support adapted to receive an ice tray, refrigerant duct loops arranged. in parallel circuit relation with the, header and enclosingfsaid: support, said duct loops including vertical .lcg portions formed integralwith horizontal portions, each of said loops provided with reverse bent portions connectingsaidleg portions. 7 a

6. In arefrig'eratjng apparatus,a cooling unit including a header refrigerant duct circuit relation loops including a cooling with the header, said. duct vertical and horizontal leg said loops provided withreverse bent portionslocated at the connection of said leg portions.v 1 I v Y I: a

7. In a refrigeratingapparatus,ajcooling unit including aheader, a, refrigerant duct loop extending therefrom- -.and enclosing a support adapted to receive an ice tray, said support having adjacent sides forming a relatively sharp corn'enesaid: duct,loop,being in a'.p la1 1e substantially erpendi cular, to the sidesand secured in intimate thermalcontact with both sidesadjacentthe corner and hav ing a reverse bentv portion located adjacent the corner of said receptacle. 8,;In" refrigerating apparatus a cooling unit including'a refrigerant duct' enclosing a support *adapted to receive'an" ice tray, said support having adjacent sides forming a re1-' atively sharp corner, said duct including portions contacting intimately with both sides adjacent the corner and a connecting por 'tion' between i said contacting portions, said connecting portion including an arc of more,

a refrigerant duct support said duct portions, each of support adapted" to receive an ice tray, said support having adjacent sides forming a relatively sharp corner, said ductloopbemg. in a plane substantially perpendicular to the 5 sides and portions contacting intimately w th both sides adjacent the corner and a connecting portion between said contacting portio'ris, said connecting portion including an arc of more than 90. m 10. A refrigerating element for refrlger- I ating apparatus comprising in combination aheader forming a reservoir for liquid refrigerant and a plurality of conduits con- 1 nected to the header in parallel circuit relation, said conduitsbeing arranged to-form substantially two vertical spaced apart rowsto define a freezingspace, some of the con duits having portions extendin horizontally within the freezing space so efined.

2o 11. A refrigeratingelement for refrigerat ing apparatus comprising in combination a header forming a reservoir for liquid 'refrigerant and a pluralityof conduits connected to the header in parallel circuit relation, said conduitsbein arran ed to form substantially two verticzfi space apart rows to define a freezing space, some of the conduits having ortions extending horizontally through the eezing space so defined. .5 12. A refrigerating element for refrigerat-ing apparatus comprising in combination a header forming a reservolr for liquid re-' frigerant and a plurality of loops of conduit connected to the header m parallel circuit re- 35 lation, some of said loops having leg portions arranged substantially in two vertical-spaced apart rows to define a freezin space, some of the loops passing horizonta ly through the freezing space. v r o 13. A refrigerating element forieftigerating apparatus comprising in combination a a header forming 'a reservoir for liquid rcfrigerant, a pluralit of conduits connected to the header in ara el circuit relation, some of said conduits eing arranged substantially V in two vertical spaced apart rows to define a freezing'space, and a plurality of supports for ice-making containers within the freezing space,.-some of the conduits having portions extending horizontally between the supports. a 14. A refrigerating element for refrigerating apparatus comprising in combination a header forming. a reservoir for liquid re frigerant, a pluralit of loops of conduits connected to the hea er in parallel circuit relation, some of said loops having leg portions arranged substantially in twovertical up--* right spaced apart'rowsto define a freezing space, and some of the loops being shorter than the other loops and passing horizontally through the freezing space.

In testimony whereof I hereto aflix my sig- 7 nature.

as I 1 JESSE ohms; 

